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Many cubes of doom.

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sigonasr2 2023-10-26 23:12:41 -05:00
parent 173ac6e344
commit ac412093de
9 changed files with 526 additions and 0 deletions
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159
Models/Models.vcxproj Normal file
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38
Models/Models.vcxproj.filters Normal file
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39
Models/ShaderError.h Normal file
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#pragma once
#include <GL/glew.h>
#include <cstdlib>
#include <iostream>
namespace ErrorCheck{
inline void printShaderLog(GLuint shader) {
int len = 0;
int chWrittn = 0;
char *log;
glGetShaderiv(shader, GL_INFO_LOG_LENGTH, &len);
if (len > 0) {
log = (char *)malloc(len);
glGetShaderInfoLog(shader, len, &chWrittn, log);
std::cout << "Shader Info Log: " << log << std::endl;
free(log);
} }
inline void printProgramLog(int prog) {
int len = 0;
int chWrittn = 0;
char *log;
glGetProgramiv(prog, GL_INFO_LOG_LENGTH, &len);
if (len > 0) {
log = (char *)malloc(len);
glGetProgramInfoLog(prog, len, &chWrittn, log);
std::cout << "Program Info Log: " << log << std::endl;
free(log);
} }
inline bool checkOpenGLError() {
bool foundError = false;
int glErr = glGetError();
while (glErr != GL_NO_ERROR) {
std::cout << "glError: " << glErr << std::endl;
foundError = true;
glErr = glGetError();
}
return foundError;
}
}

7
Models/fragShader.glsl Normal file
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#version 430
out vec4 color;
in vec4 varyingColor;
void main(void)
{
color=varyingColor;
}

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Models/glew32.dll Normal file
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111
Models/main.cpp Normal file
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#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include "utils.h"
#include <algorithm>
#include <vector>
#include <glm/glm.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <array>
#define numVAOs 1
#define numVBOs 2
GLuint renderingProgram;
GLuint vao[numVAOs];
GLuint vbo[numVBOs];
glm::vec3 camera;
glm::vec3 cubeLoc;
GLuint vLoc,projLoc;
int width, height;
float aspect;
glm::mat4 pMat, vMat;
void setupVertices(void) { // 36 vertices, 12 triangles, makes 2x2x2 cube placed at origin
float vertexPositions[108] = {
-1.0f, 1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f,
1.0f, -1.0f, -1.0f, 1.0f, 1.0f, -1.0f, -1.0f, 1.0f, -1.0f,
1.0f, -1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f, -1.0f,
1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f, -1.0f,
1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
-1.0f, -1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f, 1.0f, 1.0f,
-1.0f, -1.0f, 1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 1.0f, 1.0f,
-1.0f, -1.0f, -1.0f, -1.0f, 1.0f, -1.0f, -1.0f, 1.0f, 1.0f,
-1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, -1.0f,
1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, -1.0f, 1.0f,
-1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, 1.0f,
1.0f, 1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -1.0f, 1.0f, -1.0f
};
glGenVertexArrays(1, vao);
glBindVertexArray(vao[0]);
glGenBuffers(numVBOs, vbo);
glBindBuffer(GL_ARRAY_BUFFER, vbo[0]);
glBufferData(GL_ARRAY_BUFFER, sizeof(vertexPositions), vertexPositions, GL_STATIC_DRAW);
}
void init(GLFWwindow* window) {
renderingProgram=utils::createShaderProgram("vertShader.glsl","fragShader.glsl");
camera={0.0f,0.0f,-200.0f};
cubeLoc={0.0f,-2.0f,0.0f};
setupVertices();
}
double lastTime=0;
GLuint tfLoc;
void display(GLFWwindow* window, double currentTime) {
double elapsedTime=currentTime-lastTime;
lastTime=currentTime;
glClear(GL_DEPTH_BUFFER_BIT);
glClearColor(0,0,0.2,1);
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(renderingProgram);
vLoc=glGetUniformLocation(renderingProgram,"v_matrix");
projLoc=glGetUniformLocation(renderingProgram,"proj_matrix");
glfwGetFramebufferSize(window,&width,&height);
aspect=(float)width/(float)height;
pMat=glm::perspective(utils::degToRad(60),aspect,0.1f,1000.f);
vMat=glm::translate(glm::mat4(1.0f),glm::vec3{camera.x,camera.y,camera.z});
glUniformMatrix4fv(vLoc,1,GL_FALSE,glm::value_ptr(vMat));
glUniformMatrix4fv(projLoc,1,GL_FALSE,glm::value_ptr(pMat));
tfLoc=glGetUniformLocation(renderingProgram,"tf");
glUniform1f(tfLoc,(float)currentTime);
glBindBuffer(GL_ARRAY_BUFFER,vbo[0]);
glVertexAttribPointer(0,3,GL_FLOAT,GL_FALSE,0,0);
glEnableVertexAttribArray(0);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glDrawArraysInstanced(GL_TRIANGLES,0,36,100000);
}
int main(void) {
if (!glfwInit()) { exit(EXIT_FAILURE); }
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
GLFWwindow* window = glfwCreateWindow(1200, 1200, "Hello Cubes!", NULL, NULL);
glfwMakeContextCurrent(window);
if (glewInit() != GLEW_OK) { exit(EXIT_FAILURE); }
glfwSwapInterval(1);
init(window);
while (!glfwWindowShouldClose(window)) {
display(window,glfwGetTime());
glfwSwapBuffers(window);
glfwPollEvents();
}
glfwDestroyWindow(window);
glfwTerminate();
exit(EXIT_SUCCESS);
}

83
Models/utils.h Normal file
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#pragma once
#include <string>
#include <fstream>
#include <GL/glew.h>
#include "ShaderError.h"
#define PI 3.14159
class utils{
inline static std::string readShaderSource(const char *filePath){
std::string content;
std::ifstream fileStream(filePath, std::ios::in);
std::string line = "";
if(fileStream.fail()){
std::cout<<"Could not open shader "<<filePath<<"!"<<std::endl;
throw;
}
while (fileStream.good()) {
getline(fileStream, line);
content.append(line + "\n");
}
fileStream.close();
return content;
}
inline static void CompileShader(GLuint shader,std::string type){
GLint compiled;
glCompileShader(shader);
ErrorCheck::checkOpenGLError();
glGetShaderiv(shader,GL_COMPILE_STATUS,&compiled);
if(compiled!=1){
std::cout<<type<<" Compilation Failed!"<<std::endl;
ErrorCheck::printShaderLog(shader);
throw;
}
}
inline static void CreateShader(GLuint type,std::string shaderName,const char*source,GLuint vfProgram){
if(source!=nullptr){
GLuint vShader=glCreateShader(type);
std::string shaderFile=readShaderSource(source);
const char*vertShaderSrc=shaderFile.c_str();
glShaderSource(vShader,1,&vertShaderSrc,NULL);
CompileShader(vShader,shaderName);
glAttachShader(vfProgram,vShader);
}
};
public:
inline static GLuint createShaderProgram(const char*vertex,const char*fragment){
return createShaderProgram(vertex,nullptr,nullptr,nullptr,fragment);
}
inline static GLuint createShaderProgram(const char*vertex,const char*geometry,const char*fragment){
return createShaderProgram(vertex,nullptr,nullptr,geometry,fragment);
}
inline static GLuint createShaderProgram(const char*vertex,const char*tesselationCS,const char*tesselationES,const char*fragment){
return createShaderProgram(vertex,tesselationCS,tesselationES,nullptr,fragment);
}
inline static GLuint createShaderProgram(const char*vertex,const char*tesselationCS,const char*tesselationES,const char*geometry,const char*fragment){
GLuint vfProgram=glCreateProgram();
CreateShader(GL_VERTEX_SHADER,"Vertex",vertex,vfProgram);
CreateShader(GL_FRAGMENT_SHADER,"Fragment",fragment,vfProgram);
CreateShader(GL_TESS_CONTROL_SHADER,"Tesselation Control",tesselationCS,vfProgram);
CreateShader(GL_TESS_EVALUATION_SHADER,"Tesselation Evaluation",tesselationES,vfProgram);
CreateShader(GL_GEOMETRY_SHADER,"Geometry",geometry,vfProgram);
GLint linked;
glLinkProgram(vfProgram);
ErrorCheck::checkOpenGLError();
glGetProgramiv(vfProgram,GL_LINK_STATUS,&linked);
if(linked!=1){
std::cout<<"Linking Failed!"<<std::endl;
ErrorCheck::printProgramLog(vfProgram);
}
return vfProgram;
}
inline static float degToRad(float deg){
return deg*(PI/180);
}
inline static float radToDeg(float rad){
return rad*57.2957795130823208767;
}
};

79
Models/vertShader.glsl Normal file
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#version 430
layout (location=0) in vec3 position;
uniform mat4 v_matrix;
uniform mat4 proj_matrix;
uniform float tf;
out vec4 varyingColor;
mat4 buildTranslate(float x, float y, float z);
mat4 buildRotateX(float rad);
mat4 buildRotateY(float rad);
mat4 buildRotateZ(float rad);
void main(void)
{
float i = gl_InstanceID + tf;
float a = sin(203.0*i/8000.0)*403.0;
float b = sin(301.0*i/4001.0)*401.0;
float c = sin(400.0*i/6003.0)*405.0;
mat4 localRotX = buildRotateX(1*i);
mat4 localRotY = buildRotateY(1*i);
mat4 localRotZ = buildRotateZ(1*i);
mat4 localTrans = buildTranslate(a,b,c);
mat4 newM_matrix = localTrans*localRotX*localRotY*localRotZ;
mat4 mv_matrix = v_matrix*newM_matrix;
gl_Position=proj_matrix*mv_matrix*vec4(position,1.0);
varyingColor=vec4(position,1.0)*0.5+vec4(0.5,0.5,0.5,0.5);
}
// builds and returns a translation matrix
mat4 buildTranslate(float x, float y, float z)
{
mat4 trans = mat4(1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
x, y, z, 1.0 );
return trans;
}
// builds and returns a matrix that performs a rotation around the X axis
mat4 buildRotateX(float rad)
{
mat4 xrot = mat4(1.0, 0.0, 0.0, 0.0,
0.0, cos(rad), -sin(rad), 0.0,
0.0, sin(rad), cos(rad), 0.0,
0.0, 0.0, 0.0, 1.0 );
return xrot;
}
// builds and returns a matrix that performs a rotation around the Y axis
mat4 buildRotateY(float rad)
{
mat4 yrot = mat4(cos(rad), 0.0, sin(rad), 0.0,
0.0, 1.0, 0.0, 0.0,
-sin(rad), 0.0, cos(rad), 0.0,
0.0, 0.0, 0.0, 1.0 );
return yrot;
}
// builds and returns a matrix that performs a rotation around the Z axis
mat4 buildRotateZ(float rad)
{
mat4 zrot = mat4(cos(rad), -sin(rad), 0.0, 0.0,
sin(rad), cos(rad), 0.0, 0.0,
0.0, 0.0, 1.0, 0.0,
0.0, 0.0, 0.0, 1.0 );
return zrot;
}
// builds and returns a scale matrix
mat4 buildScale(float x, float y, float z)
{
mat4 scale = mat4(x, 0.0, 0.0, 0.0,
0.0, y, 0.0, 0.0,
0.0, 0.0, z, 0.0,
0.0, 0.0, 0.0, 1.0 );
return scale;
}

10
OpenGLTemplate.sln
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@ -7,6 +7,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "OpenGLTemplate", "OpenGLTem
EndProject
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EndProject
Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Models", "Models\Models.vcxproj", "{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}"
EndProject
Global
GlobalSection(SolutionConfigurationPlatforms) = preSolution
Debug|x64 = Debug|x64
@ -31,6 +33,14 @@ Global
{58758496-B3F4-482C-93BA-740C847A58CB}.Release|x64.Build.0 = Release|x64
{58758496-B3F4-482C-93BA-740C847A58CB}.Release|x86.ActiveCfg = Release|Win32
{58758496-B3F4-482C-93BA-740C847A58CB}.Release|x86.Build.0 = Release|Win32
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Debug|x64.ActiveCfg = Debug|x64
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Debug|x64.Build.0 = Debug|x64
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Debug|x86.ActiveCfg = Debug|Win32
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Debug|x86.Build.0 = Debug|Win32
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Release|x64.ActiveCfg = Release|x64
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Release|x64.Build.0 = Release|x64
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Release|x86.ActiveCfg = Release|Win32
{6E813500-09F1-40C1-BF2A-E8C4D0DE1142}.Release|x86.Build.0 = Release|Win32
EndGlobalSection
GlobalSection(SolutionProperties) = preSolution
HideSolutionNode = FALSE